The answers (comments) here are mostly unfair. I’m well aware of what halacha says. But there is a “fifth” Shulchan Aruch. This one dictates that husbands trust their wives with many things (several of which are enunciated in the other four sections of the Shulchan Aruch). Women are to be trusted with calculating their own cycles, etc., and to ask shailos only when they feel the need to do so. Women are trusted in checking vegetables, and in running the affairs of the kitchen. The concept of treating a wife like a slave is foreign to Torah. To those who doubt this, revisit Aishes Chayil, in your zmiros, siddur, or in its source in Mishlei.
There are situations in which women are spenders that need outside controls, or have difficulty in managing budgets. The ideal responsibility for the husbands is not to control but to help. Marriage is a partnership, and it is not Torah consistent to treat it differently.
To restrict a wife from having money to spend is, in most cases, abusive, cruel, and demeaning. And if anyone feels that they are entitled to this, help is direly necessary. There cannot be shalom bayis in an environment where there is a slave and a master.